Haruyoshi Takatsu

This inventor holds 69 USPTO granted patents and 3 published patent applications, plus 1 CIPO patent and 5 EPO patents, primarily in Liquid Crystal Technology (CPC class 2522). Top assignees: Dainippon Ink and Chemicals, Incorporated, Dic Corporation, Hoffmann-La Roche Inc.. Active years: 1977-2018.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Haruyoshi Takatsu. Retrieved from https://idiyas.com/inventor/haruyoshi-takatsu

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 69 (Patent Applications = 3)

% Patents Active = 92.8

CIPO Patents = 1

EPO Patents = 5 (Patent Applications = 4)

Average Co-Inventor Count = 3.7

ph-index = 13

Forward Citations = 587(Granted Patents)

Forward Citations (Not Self Cited) = 557(Dec 10, 2025)

Inventors with similar research interests:

Location History:

Kodaira, JA (1977)
Kodaira, JP (1979 - 1995)
Tokyo, JP (1987 - 2010)
Kitaadachi-gun, JP (2012 - 2018)

Company Filing History:

57 out of 630

Dainippon Ink and Chemicals, Incorporated

Hoffmann-La Roche Inc.

patents

4. 3 out of 42

Kawamura Institute of Chemical Research

Dainippon and Chemicals, Inc.

Dainippon Mk & Chemicals Inc.

patent

11. 1 out of 16

Dic Corporation (Tokyo)

patents

where one patent can have more than one assignee

Years Active: 1977-2018

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Areas of Expertise:

LCD Device

Liquid Crystal Composition

Nematic Liquid Crystal

Polymer Alignment Layer

Cinnamic Acid Derivative

Fluorine-Substituted Compound

Cyclic Hydrocarbon Derivative

Tricyclic Fluorobenzonitrile

Chlorophenylalkoxyalkyl Compounds

Phenylcyclohexyldioxane Derivatives

Optically Anisotropic Film

69 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 10133109 - LCD device (2018-11-20),

2. 10095066 - Cinnamic acid derivative, polymer thereof, and liquid crystal alignment layer comprising cured product thereof (2018-10-09),

3. 9939555 - Cinnamic acid derivative, polymer thereof, and liquid crystal alignment layer comprising cured product thereof (2018-04-10),

4. 9684206 - Copolymer, and liquid crystal alignment layer including cured product thereof (2017-06-20),

5. 9360708 - Cinnamic acid derivative, polymer thereof, and liquid crystal alignment layer comprising cured product thereof (2016-06-07),

6. 9340634 - Polymer for use in liquid crystal alignment layer (2016-05-17),

7. 8361343 - Nematic liquid crystal composition and bistable nematic liqud crystal display (2013-01-29),

8. 8252202 - Nematic liquid crystal composition and bistable nematic liquid crystal display (2012-08-28),

9. 7718232 - Nematic liquid crystal composition and liquid crystal display element that used the composition (2010-05-18),

10. 7198827 - Nematic liquid crystal composition and liquid crystal display device using the same (2007-04-03),

11. 7145047 - Naphthalene derivative and liquid crystal composition comprising the same (2006-12-05),

12. 7108896 - Method of increasing helical twisting power, optically active compound, liquid crystal compostion containing the same, and liquid crystal display device (2006-09-19),

13. 7067179 - Fused ring compound (2006-06-27),

14. 6913797 - Decahydronaphthalene derivative (2005-07-05),

15. 6746728 - Compound having tetrahydronaphthalene skeleton and liquid crystal composition containing same (2004-06-08),

Title: Haruyoshi Takatsu: Innovator in Liquid Crystal Technology

Introduction

Haruyoshi Takatsu is a distinguished inventor based in Tokyo, Japan, known for his significant contributions to the field of liquid crystal devices. With an impressive portfolio of 69 patents, Takatsu has made remarkable advancements that have impacted the technology industry.

Latest Patents

Among his latest innovations, Takatsu developed an LCD device featuring remarkable high-speed responsiveness. This cutting-edge device incorporates a polymer or copolymer within its liquid crystal composition, strategically sandwiched between two transparent substrates, with at least one substrate being equipped with an electrode. The unique formula stipulates that the polymer or copolymer content ranges from 1% by mass to less than 40% by mass of the total liquid crystal composition. This versatile device supports various operation modes, including TN, STN, ECB, VA, VA-TN, IPS, FFS, π cell, OCB, and cholesteric liquid crystals. Additionally, he has created a liquid crystal alignment layer characterized by a compound represented by a specific general formula, enhancing the performance of liquid crystal displays.

Career Highlights

Throughout his career, Takatsu has held pivotal roles in notable companies such as Dainippon Ink and Chemicals, Incorporated and Dic Corporation. His work in these organizations has allowed him to pioneer advancements in liquid crystal technology and establish a solid foundation for future innovations.

Collaborations

In the course of his career, Takatsu has collaborated with esteemed colleagues, including Kiyofumi Takeuchi and Hisato Sato. These partnerships have facilitated the exchange of ideas and knowledge, further propelling his contributions to the field.

Conclusion

Haruyoshi Takatsu's achievements in liquid crystal technology highlight his status as a leading inventor in the industry. With 69 patents to his name, his ongoing innovations continue to shape the future of LCD devices, reinforcing the importance of creativity and collaboration in technological advancements.

Profile summary based on public USPTO records.